GB1066438A - Lasts for use in the manufacture of footwear - Google Patents

Lasts for use in the manufacture of footwear

Info

Publication number
GB1066438A
GB1066438A GB4333163A GB4333163A GB1066438A GB 1066438 A GB1066438 A GB 1066438A GB 4333163 A GB4333163 A GB 4333163A GB 4333163 A GB4333163 A GB 4333163A GB 1066438 A GB1066438 A GB 1066438A
Authority
GB
United Kingdom
Prior art keywords
mould
polyurethane
hard
mixture
lining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB4333163A
Inventor
Leonard James Lewis Davies
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mobbs & Lewis Ltd
Original Assignee
Mobbs & Lewis Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mobbs & Lewis Ltd filed Critical Mobbs & Lewis Ltd
Priority to GB4333163A priority Critical patent/GB1066438A/en
Publication of GB1066438A publication Critical patent/GB1066438A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D35/00—Producing footwear
    • B29D35/12—Producing parts thereof, e.g. soles, heels, uppers, by a moulding technique
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D3/00—Lasts
    • A43D3/02—Lasts for making or repairing shoes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0407—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by regulating the temperature of the mould or parts thereof, e.g. cold mould walls inhibiting foaming of an outer layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0025—Applying surface layers, e.g. coatings, decorative layers, printed layers, to articles during shaping, e.g. in-mould printing
    • B29C37/0028—In-mould coating, e.g. by introducing the coating material into the mould after forming the article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
    • B29K2105/043—Skinned foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/48—Wearing apparel
    • B29L2031/50—Footwear, e.g. shoes or parts thereof

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

A last of foamed polyurethane having a hard and smooth surface is made by casting in a mould. The mould may comprise two parts of thermoplastic sheet material with different shrink properties e.g. one part of low-density polyethylene and the other of high-density polyethylene or one part may be of polypropylene. The sheet material may be vacuum formed to define mould cavity linings for moulds of a settable material e.g. an epoxy resin, plaster of paris. In another example the mould is formed by taking a wooden core spraying it with a polyurethane mixture which sets hard and smooth and then locating the coated core in a box which is filled with a polyurethane reactant mixture. To form the last the inner surface of the mould may be sprayed with a mixture which reacts to form a lining of a hard polyurethane which lining is filled with a polyurethane foam of lower density. The hard smooth surface may be caused by differential cooling between the surface and interior of the body.
GB4333163A 1963-11-02 1963-11-02 Lasts for use in the manufacture of footwear Expired GB1066438A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB4333163A GB1066438A (en) 1963-11-02 1963-11-02 Lasts for use in the manufacture of footwear

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4333163A GB1066438A (en) 1963-11-02 1963-11-02 Lasts for use in the manufacture of footwear

Publications (1)

Publication Number Publication Date
GB1066438A true GB1066438A (en) 1967-04-26

Family

ID=10428314

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4333163A Expired GB1066438A (en) 1963-11-02 1963-11-02 Lasts for use in the manufacture of footwear

Country Status (1)

Country Link
GB (1) GB1066438A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2456601A1 (en) * 1979-05-14 1980-12-12 Itt PROCESS FOR PREPARING A MOLDED POLYURETHANE ELEMENT AND ELEMENT OBTAINED BY THIS PROCESS
WO2000060973A1 (en) * 1999-04-12 2000-10-19 Overseas Patents And Systems Ltd. Method for completion of footwear and shoe filler

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2456601A1 (en) * 1979-05-14 1980-12-12 Itt PROCESS FOR PREPARING A MOLDED POLYURETHANE ELEMENT AND ELEMENT OBTAINED BY THIS PROCESS
WO2000060973A1 (en) * 1999-04-12 2000-10-19 Overseas Patents And Systems Ltd. Method for completion of footwear and shoe filler

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